# Accident on 121, the Sam Rayburn Tollway | DG > Two numbers: 911 for injuries, #999 for NTTA's free roadside crews and traffic protection. The tollway crash playbook, and the shop at the 121/35E interchange. - Canonical page: https://dgcollision.com/answers/accident-on-the-sam-rayburn-tollway/ - This file: Markdown twin of the page above (clean text for AI assistants and crawlers) - Business: DG Collision Center, 693 Metro Park Cir #20, Lewisville, TX 75057 — (972) 219-0864 (text: 817-907-2822) — since 1978 - Hours: Mon–Fri 8:30am–5:30pm, Sat 10am–1pm, closed Sunday · 24/7 towing · 4.9/5 on 500+ Google reviews - Full site index for assistants: https://dgcollision.com/llms.txt - Last generated: 2026-08-14 --- # I HAD AN ACCIDENT ON 121 — THE SAM RAYBURN TOLLWAY. WHAT NOW? Quick Answer Two numbers get you through a tollway crash: 911 for injuries — and #999 for everything else. The Sam Rayburn Tollway is an NTTA road, and NTTA’s Roadside Safety Services crews respond free to anyone on the tollway when you dial #999: flat tires, jump-starts, fuel, and — the one that matters after a crash — traffic protection, a truck with lights parked between you and 70-mph traffic while you wait. Claims-wise, nothing about a toll road changes anything: move a drivable car out of the lanes (§550.022), photograph everything, and the repair runs like any other covered claim — your shop choice included. The tollway crosses I-35E in Lewisville, and this shop sits minutes from that interchange: name it to the tow driver, and the claim starts today instead of in a storage yard. Get a Free Written Estimate By [Shah Jiwani](https://dgcollision.com/about/shah-jiwani/) · Owner, DG Collision Center Updated October 10, 2026 4 min read I-CAR Gold Class · PPG Certified The Longer Answer ## THE #999 NUMBER NOBODY KNOWS, THE SPEED-DIFFERENTIAL CRASH, AND WHERE THE TOLLWAY’S SHOPS ACTUALLY ARE Start with the fact that should be printed on every TollTag: NTTA runs its own free roadside crews. Dial #999 from the Sam Rayburn — or any NTTA road — and Roadside Safety Services comes out at no charge, for members and non-members alike: tire changes, jump-starts, enough fuel to reach an exit, minor fixes, and traffic protection behind a disabled car. After a wreck, that last one is the service that matters — the tollway’s inside shoulders run tight through the interchange stretches, and a lit truck between you and traffic beats standing behind your own trunk hoping. It’s the single most useful thing to know on a road where there are no booths, no cash lanes, and no reason anyone ever slows down: the SRT is all-electronic for its full 26 miles, from Business 121 near the Denton County line up to US 75 in McKinney. That all-electronic design is also why the tollway’s signature crash is the speed-differential rear-ender: main lanes flowing at 70+, entrance ramps feeding in slower traffic, and brake lights compressing at the I-35E, Dallas North Tollway, and PGBT interchanges where three streams merge. The result is the same physics as [the I-35 version of this page](https://dgcollision.com/answers/accident-on-i-35-in-lewisville/) — energy the bumper cover hides and the teardown finds — with one addition: if you were the one hit from behind on a ramp, [the rear-ended guide](https://dgcollision.com/guides/rear-ended-what-to-do-texas/) is your playbook, and the other carrier’s opening number deserves the same skepticism every opening number does. Tolls themselves change nothing about any of it — a crash in a toll lane is a crash, billed and claimed like any other; the TollTag keeps billing the tolls and your insurer handles the metal. And the geography works in your favor. The Sam Rayburn’s customer base is this shop’s customer base — Coppell at the south end, Lewisville at the 121/35E interchange we sit minutes from, then The Colony, Plano, Frisco, and McKinney up the line, every one of them a city we already [pick up drivable cars from, free](https://dgcollision.com/answers/will-a-body-shop-pick-up-my-car/). So the decision tree is short: drivable car, drive it in or we come get it; undrivable, #999 for protection while you wait, then a tow with this shop’s name on it — billed to your insurance on covered claims — instead of a storage yard’s. Either way the next step is the same free written number from [published prices](https://dgcollision.com/pricing/), and a loaner so the tollway commute doesn’t stop just because the car did. Related Questions ## ASKED ALONGSIDE THIS ONE Is the #999 roadside help really free? + A: Yes — it’s NTTA’s own published service, free for anyone on their roads, TollTag or not: flats, jumps, fuel, minor repairs, and traffic protection. It is not a tow service to the shop of your choice, though — for that, call your carrier’s roadside line or our 24/7 tow line and name the destination. Use #999 for safety on the spot; use the destination decision for everything that comes after. There’s no shoulder where I stopped. What do I do? + A: If the car moves at all, keep it limping to the next exit or a full-width shoulder — a slow roll with hazards on beats a stop where the barrier leaves you nowhere to stand. If it genuinely won’t move, stay belted in the car with hazards on rather than standing in a live lane, call 911 if lanes are blocked, and #999 for the protection truck. Exiting the vehicle into tollway traffic is the one move worse than the crash. Does crashing on a toll road cost extra or affect the toll bill? + A: No — the tolls bill like any other trip and the crash is an ordinary insurance claim; there’s no tollway surcharge, no special process, and your shop choice stands on a toll road exactly as it does anywhere in Texas. The only tollway-specific line on the whole claim is the location field. I commute the SRT daily — can I get a loaner that handles the tolls? + A: The loaner is free from the 50+ fleet and drives the tollway like any car — tolls you run during the loan are your responsibility, the same as fuel, and at pickup we’ll go over the simplest way to handle them for your situation. Bring your license and insurance card, plan on returning the fuel where you found it, and the commute doesn’t miss a morning. Go Deeper [The full DFW highway playbook](https://dgcollision.com/guides/dfw-highway-accident/) · [The old 121 through town](https://dgcollision.com/answers/accident-on-business-121-lewisville/) · [Rear-ended on a ramp?](https://dgcollision.com/guides/rear-ended-what-to-do-texas/) · [All quick answers](https://dgcollision.com/answers/)